Combination gas cock and thermostatic control means



Nov. 16, 1937. B. L. MATTHEWS El AL 2,099,171

COMBINATION GAS COCK AND THERMOSTATIC CONTROL MEANS Filed Oct. 27', 1934 N. I N m N w i w o, I

Q n I 'INVENTOR.' ,EirabardL. Mazfleha" BY Jam rMm-wn ATTORNEY.

Patented Nov. 16, 1937 PATENT ,o-FFica COMBINATION GAS COCK- AND STATIC CONTROL MEANS Birchard L. Matthews, Lakewood, and John T. Marvin, Fairview Village, Ohio, assignors to The Patrol Valve Company, Cleveland, Ohio Application October 22, 1934, Serial No. 750,240

v2 Claims.

The objects of this invention'are to combine an oven burner valve with an oven control thermostatic regulator; to combine these devices under a single control member; to combine them so that each element may be operated independently of the other.

The invention includes a gas valve having a handle thereon and for the operation thereof. This handle is likewise provided with means for controlling the adjustment of a thermostatic valve. The device is so designed that the valve may be operated without aifecting the thermostat and then the thermostat may be operated withou aflecting the valve.

In the drawing Fig. 1 shows a sectional view of the valve and control, together with a thermostat attached thereto and an oven burner shown somewhat diagrammatically; and

Fig. 2 is a sectionon the line 2--2 of Fig. 1.

In the drawing the device is indicated generally at In. It includes a body member having a gas or fuel inlet |2 at one side thereof and a fuel outlet |3 at one end thereof. On a side of the body member spaced from inlet I2 is a boss member It.

Within member II is a rotatable valve plug l6 having a passageway l6 therein adapted to selectively establish communication between inlet l2 and outlet l3. The plug is rotated in body member II by means of a stem ll secured to the plug and projecting therefrom. A removable cap member I8 is secured over the end of the'body member, II as shown, and between this cap member and the plug, and surrounding stem I1 is a coil spring l3 that maintains the plug IS in place. To the outer end of stem I1 is fixed gear 23.

Journalled for rotation in boss I4 is a second stem or shaft 2|, to one end of which is secured operating handle 22. Likewise secured to this stem is an arcuate rack 23 having teeth thereon for approximately 90 of its periphery as shown in Fig. 2. It will be observed that member 23 is somewhat, thicker than member 20 with which it engages, for reasons to be set out hereafter.

A thermostatic valve member 25 may extend into the heating range of the burner shown diagrammatically at 26, which burner is supplied with fuel from outlet l6 through line 21, valve 26 and line 28. It will thus be seen that the valve member 26 controls the flow of fuel to the burner 23, as also does the valve ll.

The thermostatic valve member herein shown includes a rod 23 and a tube 30 having different coefllcients of expansion, so that when the thermostat becomes heated,- rod 23 will move to the left of Fig. 1. This motion permits lever 3| pivoted'to a valve 32 to move to the left, andthe valve closes under the influence of a spring 33 engaging against a removable plug 34. The .valve assembly may be removed through the opening closed by the plug 34." g a Upon stem 2| is a threaded portion 36 engaging in the housing of valve 25. The operating a stem 2| terminates in a fulcrum point 36 adapted to engage with lever 3|. With the lever in en- 10 gagement with the fulcrum point, motion of rod 23 into the'housing will open valve 32by pivoting lever 3| about the thermostat rod 23, and permit the flow of gas to burner 26. It will be observed that adjustment of this fulcrum point 36 by I means of rotation of handle 22 producedsome axial movement of the operating stem 2|. It is for this reason that the arcuate member 23 is made somewhat thicker than gear with which it engages, in order to insure that these two mem- 20 bers, 20 and 23, will under all conditions of adjustment of point 36, be in proper relation for interengagement.

As a substitute for the movement of point 36 by threads 35, a necessitating axial movement of shaft 2|, a cam or some other like arrangement could be used to vary the upper pivot point of lever 3|. Such change would be an obvious one, and would do away with the necessity of making rack gear 23 thickerjthan gear 23.

The operation of the device 'isas follows: Inlet I2 is connected to a source or. gas supply. When it is desired to turn on or operate the burner 36 handle 22 is rotated, whereupon the teeth of member 23 engage with gear 20 to rotate plug l6 and put the passage IS in position to admit gasv to line 21 which is the position shown. Thermostat 25 being cold, valve 32 is opened by action point 36 on lever 3|, so that gas flows through line 28 to burner 26 simultaneously with the opening of valve I 0. Of course it is not essential that the thermostatic valve be closed when valve In is closed, this involving merely designing the control by operating stem 2| so that upon its-rotation to close valve l6, point 36 is at the 4 same time withdrawn suiiiciently to permit valve 32 to close, and designing it further so that the rotation of stem 2| to open valve l3 advances point 36 enough to'open valve 32. This eifect may be produced by providing the proper pitch of threads 35, and adjusting gear 23 to the proper point on stem 2i.

Further rotation of handle 22 does not affect gear 20 since there are no teeth on the portion of element 23 now contiguous to gear 20. As this creasing and increasing the flow of fuel through rotation continues point 66 is extended further into the valve and as it acts as a fulcrum for lever 3|, it changes the temperature at which the thermostat permits the valve to close; Of course this closing takes effect when the thermostat, heated by burner 26, moves the rod 26 sufllciently to the left to be free of lever 8|, and this point is varied by the relative adjustment of point 66.

Should it be desired to operate the burner inde- It will be obvious that this device has 'manyapplications. One very obvious use is in connection with a gas range oven, wherein burner 26 is the oven burner, and the. thermostat extends into the oven to be influenced by the temperature' thereof. Thusthe device provides a very convenient control for oven burners, wherein the thermostat and gas valve are operated by a single handle. And this control providesmeans for operating the burner either for manual control, or for automatic control. It is usual to provide a pilot burner for automatic control, and this could be done in any of the well known ways.

Having described the invention, what is claimed is:

1. A control device for a fluid fuel burner, comprising in combination, a fuel line adapted to be connected with a source of fuel supply, a fuel flow regulating valve in said fuel line,'a thermostat adapted to respond to the heat of the burner and associated with said valve for dethe valve in response to increase and decrease respectively, of the heat of the burner, means for regulating the effect of said thermostat on the valve, a shut-ofl 'valve in the fuel line, a single control device comprising a rotatable element for actuating the shut-oi! valve and the regulating means, and an intermittent driving gearing between the rotatable element and the shut-off valve whereby the regulating means for the thermostat can be regulated by further rotation of the rotatable element after the shut-ofl valve is opened.

2. A controldevice for a fluid fuel burner, comprising in combination, a fuel line adapted to be connected with a source of fuel supply, a fuel flow regulating valve. in said fuel line, a thermostat adapted to respond to the heat of the burner and associated with said valve for decreasing and increasing the flow of fuel through the valve in response to increase and decrease respectively, of the heat of the burner, means for regulating the effect of said thermostat on the valve, a shut-off valve in the fuel line, a single control device comprising a rotatable element for actuating the shut-oi! valve and the regulating means, a gear connected with the shut-off valve and a segmental driving gear carried by said element cooperating with said gear whereby the effect of said regulating means for the thermostat can be regulated by further rotation of the rotatable elements after the shut-off valve has been opened by said gear and segmental gear. BIRCHARD I...v MATTHEWS. JOHN T. MARVIN. 

